Benro QR4 Overview The QR4 Video Quick Release Plate enables mounting a camera to the Benro S2 video tripod head. It is a slide-in style plate and includes one 1/4″-20 screw with a pin assembly. In the Box Benro QR4 Video Quick Release Plate for S2 Video Head Limited 3-Year Warranty, Extendable up to 5 Years with Online Registration